DOWNLOAD Sharp LC-15B2E (serv.man2) Service Manual ↓ Size: 225.07 KB | Pages: 32 in PDF or view online for FREE

Model
LC-15B2E (serv.man2)
Pages
32
Size
225.07 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Technical Manual (tentative)
File
lc-15b2e-sm2.pdf
Date

Sharp LC-15B2E (serv.man2) Service Manual ▷ View online

4
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
(5) Environmentally sensitive technology
The power consumption of 20' LC-20B2H/M is as low as 43.
It means energy saving of about 57% as compared with our cathode ray tube television of the same screen size.
The life of the backlight is 60,000 hours (it is judged to be dead when the brightness is reduced by half), which
means that it can be used for about 10 years even if the TV is on for 16 hours per day.
The adoption of halogen material, the unification of fire retardant grade, the adoption of a stand 30% of which is
made from reworked material, the abolition of foam polystyrene and the construction design taking disassembling
into account have greatly reduced the load on the environment.
(6) Operability
The connection terminal is covered and the cable clamp can be attached to the foot of the stand, which are to make
the cable wiring not attract attention.
The adoption of a new design in the remote control makes it easy to hold it.  The frequently used volume/channel
select keys having the same image as the buttons located in the top portion of the main body also raised visibility.
5
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
3. GENERAL DESCRIPTION OF FUNCTIONS OF CIRCUITS IN EACH UNIT
MAIN UNIT
CIRCUIT
REF.No.
MAIN PARTS CODE
FUNCTION
Video circuit
IC801
VHIVPC3230D-1
Digital video signal processing
A/D converter, Color detection and decode
Image switching, Image control
Image quality correction, Contour correction
Component signal processing
4 Line Digital Comb Filter
CPU
IC2001
RH-IXA003WJZZQ
IC control, Channel selection control, Lamp error control
OSD, Remote control decode
Closed caption decode
V-Chip decode
LCD control
IC1201
RH-IX3378CEZZ
Liquid crystal timing control
Light control, OSD display
Vertical and horizontal reverse display control
PAL pixel skipping 7-6 line conversion, 8-6 bit conversion
IC1202
VHIPD485505-2
Memory for pixel skipping line conversion
IC1203
VHITC4W53U/-1
Gate control
IC1204
VHITC4024BF-1
Gate control
IC1205
VHITC4052BF1E
Gate control
Gray level circuit
IC1101
VHIMB8346BV-1
D/A converter
Gray level voltage generation
IC1102
VHINJM4565V-1
Dual operational amplifier
IC1103
Gray level voltage buffer
IC1104
IC1105
VHIBU4053V/-1
3-circuit 2-channel analog multiplexer
IC1110
Gray level voltage switching
IC1106
VHINJM4580V-1
Dual operational amplifier
IC1107
Gray level voltage buffer drive
IC1108
IC1109
VHINJM353M/-1
Dual operational amplifier
Common voltage buffer
6
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
CIRCUIT
REF.No.
MAIN PARTS CODE
FUNCTION
Tuner
TU3201
VTUVT2U5CD553
PLL channel selection, Video detection, Audio detection, AFT, AGC
Audio circuit
IC3304
RH-IX3371CEN1Q
Digital audio signal processing
SIF detection, NICAM/IGR detection and decode
Audio input switching, Equalizer, Volume control
A/D converter, D/A converter
IC3301
VHINJM4560M-1
Operational amplifier
IC3302
Active filter (acoustic characteristic correction)
IC3303
IC3305
VHILA4635A+-1S
Audio output amplifier
Power supply
IC3701
VHINJM2377M-1
DC/DC PWM control
circuit
T3701
RTRNZ0800CEZZ
DC/DC transformer
IC3702
VHINJM2147M-1
Operational amplifier, 31V/29V power supply stabilization
R3760
RVR-M8026TAZZ
B+ adjusting control (+5V adjustment)
Lamp error detection
Discrete circuit
Lamp error detection
AV2-IN/OUT
IC3501
VHITC4053BF1E
Audio I/O switching
Discrete circuit
Video I/O switching
TERMINAL UNIT
CIRCUIT
REF.No.
MAIN PARTS CODE
FUNCTION
AV1 input
Discrete circuit
Video/Audio/S video input terminal
Inverter circuit
T5701
RTRNZ0777CEZZ
LC-13B2H/M, LC-15B2H/M only
T5702
DC/AC inverter
Backlight lamp drive
JACK UNIT
CIRCUIT
REF.No.
MAIN PARTS CODE
FUNCTION
Operation circuit
Switches
Power switch, Channel selector UP/DOWN switch
Volume UP/DOWN switch, Menu switch, TV/VIDEO switch
OPERATION UNIT
CIRCUIT
REF.No.
MAIN PARTS CODE
FUNCTION
Remote control circuit
RMC4002 RRMCU0239CEZZ
Infrared remote control receiver
LED circuit
D4014
RH-PX0421CEZZ
Power LED (Standby: Red, Power-on: Green)
D4015
RH-PX0421CEZZ
Sleep Timer LED (Sleep Timer ON: Red)
R/C RECEIVER UNIT
CIRCUIT
REF.No.
MAIN PARTS CODE
FUNCTION
Inverter A
T6751
RTRNZ0798CEZZ
DC/AC inverter
T6752
Backlight lamp drive
T6753
Inverter B
T6551
RTRNZ0798CEZZ
DC/AC inverter
T6552
Backlight lamp drive
T6553
INVERTER-A/B UNIT (LC-20B2H/M only)
7
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
3-1. Tuner circuit
The tuner, whose RF circuit is composed of FET and whose local oscillation circuit, mixing circuit, IF amplifier
circuit and PLL circuit are composed of 1-chip IC, is 2-in-1 construction which has IF signal processing circuit
built in.
The channel selection circuit is of PLL frequency synthesizer type under the control of I2C bus. The receiving
frequency range is from 44.25 to 863.25 MHz, which can cover almost all VHF, UHF and CATV channels.
The IF signal processing circuit of the split carrier type employs the video PLL synchro system.
For video, a 1Vp-p composite signal is outputted from the terminal No. 19 (Video).  For audio, a SIF signal is
outputted from the terminal No. 15 (SIF).
21
ANT
HPF
BPF RF AMP
BPF
RF AMP
T.BPF
MIX
OSC
LPF
SAW
VIF
AMP
VIDEO
DET
FM DET AF AMP
EQ
AMP
SAW
IF AMP
MIX
I
2
C PLL
OSC
MIX-PLL IC
T.BPF
VHF SECTION
AGC
1
AS
3
SCL
4
SDA
5
MB
6
BP
7
BT
9
IF OUT
11
SIF
AMP
AGC
AFT
18
MUTE
17
SIF 
OUT   15
AUDIO
OUT   16
VIDEO
OUT   19
Fig. 3-1. Tuner circuit
VIDEO OUT signal waveform
Page of 32
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Sharp LC-15B2E (serv.man2) Service Manual ▷ Download

  • DOWNLOAD Sharp LC-15B2E (serv.man2) Service Manual ↓ Size: 225.07 KB | Pages: 32 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp LC-15B2E (serv.man2) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp LC-15B2E (serv.man2) LCD. Information contained in Sharp LC-15B2E (serv.man2) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.